Alejandro Manuel Cárdenas Robles (born October 4, 1974 in Hermosillo, Sonora) is a retired track & field athlete from Mexico. He is married to high jumper athlete Romary Rifka.
After forming part of the Mexican 4 X 100 metres relay in the 1992 Summer Olympics, he opted for the decathlon.
In 1995 he earned a bronze medal in the Pan American Games in decathlon and another bronze as the member of the 4 X 100 relay.
During 1996, he specialized in the 400 m dash, in which participated in the 1996 Summer Olympics, and qualified for the semifinals, with a time of 45.33 s.
In 1998 he participated in the Central American and Caribbean Games, in 400 m dash, in which he earned a bronze medal.
Cárdenas also participated in 1999 on the IAAF World Indoor Championships, in 400 m dash in which he earned a bronze medal. That same year also participated in the World Championships in Athletics. Alejandro ran along with Michael Johnson, he reached a third place, and a personal record of 44.31 s.
Little time later he participated in which were its last Pan American Games, reaching a third place in the 400 m dash.
Alejandro participated in the 2000 Summer Olympics, in 400 m dash, running 46.14 s in the first round, and 45.66 in the semifinals, in which did not advance.
Four years later Cárdenas participated in the 2004 Summer Olympics, in the 400 m dash, running 45.46 s in the first round, and 45.64 s in the semifinals, in which did not advance.
In the 2005 the Mexican athlete again participated in the World Championships, in Helsinki, Finland, being eliminated in the first round with a time of 46.73 s.
|1992||Central American and Caribbean Junior Championships (U-20)||Tegucigalpa, Honduras||3rd||100 m||10.6 (0.0 m/s)|
|Ibero-American Championships||Seville, Spain||4th||4 × 100 m relay||40.29|
|Olympic Games||Barcelona, Spain||—||4 × 100 m relay||DSQ|
|World Junior Championships||Seoul, South Korea||29th (qf)||100m||10.83 (wind: +1.8 m/s)|
|28th (h)||200m||21.88 (wind: +0.7 m/s)|
|9th (h)||4 × 100 m relay||42.12|
|14th (h)||4 × 400 m relay||3:19.47|
|1993||World Championships||Stuttgart, Germany||16th (h)||4 × 100 m relay||39.79|
|1994||Ibero-American Championships||Mar del Plata, Argentina||4th||Decathlon||7.015 pts W|
|2nd||4 × 400 m relay||3:07.75|
|1995||Pan American Games||Mar del Plata, Argentina||3rd||Decathlon||7387 pts|
|3rd||4 × 100 m relay||39.77|
|World Championships||Gothenburg, Sweden||18th (h)||4 × 100 m relay||39.66|
|18th (h)||4 × 400 m relay||3:07.22|
|Universiade||Fukuoka, Japan||13th (sf)||100 m||10.62|
|5th||4 × 100 m relay||40.14|
|1996||Ibero-American Championships||Medellín, Colombia||1st||4 × 100 m relay||39.60|
|Olympic Games||Atlanta, United States||18th (qf)||400 m||45.33|
|1997||World Indoor Championships||Paris, France||10th (sf)||400 m||46.50|
|9th (h)||4 × 400 m relay||3:11.41|
|World Championships||Athens, Greece||28th (qf)||400 m||46.63|
|1998||Ibero-American Championships||Lisbon, Portugal||1st||400 m||45.04|
|1st||4 × 400 m relay||3:06.12|
|Central American and Caribbean Games||Maracaibo, Venezuela||3rd||400 m||45.22|
|1999||World Indoor Championships||Maebashi, Japan||3rd||400 m||46.02 NR|
|World Championships||Seville, Spain||3rd||400 m||44.31 PB|
|Pan American Games||Winnipeg, Canada||3rd||400 m||44.92|
|2000||Olympic Games||Sydney, Australia||23rd (qf)||400 m||45.66|
|2001||Central American and Caribbean Championships||Guatemala City, Guatemala||3rd||400 m||45.85 A|
|World Championships||Edmonton, Canada||14th (h)||4 × 400 m relay||3:03.19 NR|
|2004||Ibero-American Championships||Huelva, Spain||3rd||400 m||45.22|
|Olympic Games||Athens, Greece||16th (sf)||400 m||45.64|
|2005||World Championships||Helsinki, Finland||35th (h)||400 m||46.73 SB|
- 200 metres - 20.63 s (1998)
- 400 metres - 44.31 s (1999)
- Decathlon - 7,614 points (1996)